carnal knowledge vs sexual congress

carnal knowledge and sexual congress both are nouns.

Word	Noun	Adjective	Verb	Adverb
carnal knowledge	Yes	No	No	No
sexual congress	Yes	No	No	No

As nouns, carnal knowledge and sexual congress are synonyms defined as:

carnal knowledge and sexual congress: sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur

Other synonyms of carnal knowledge include coition, coitus, copulation, intercourse, relation, sex act, sexual intercourse, sexual relation.

carnal knowledge (noun)	sexual congress (noun)
sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur	sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur